package singleton;

/**
 * 单例模式
 **/
public class Singleton {
	private static Singleton instance;

	private Singleton() {

	}

	public static Singleton getSingleton() {

		if (instance == null) {
			synchronized (Singleton.class) {
				if (instance == null) {
					instance = new Singleton();
				}
			}
		}

		return instance;
	}
}
